Chinampas, or floating gardens -- small artificial islands full of crops, built up on shallow lake beds -- once sustained the Aztec capital of Tenochtitlan, producing multiple harvests every year. They still exist in Mexico City, for now.

Our fearless green-living pioneer, the Greenie Pig, went in search of the elusive Pacific razor clam. Lucky for her, she met a gun-toting clam angel, who gave her a taste of the community that comes from a shared search for sustenance.